using System;
using System.Collections.Generic;
using System.Configuration;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Epost.DAL
{
    public class DB_Oracle
    {
        private DataBaseOpration.OprationOraDAL db;
        private string _strOracleMIDConnString = ConfigurationManager.ConnectionStrings["OraMidConnString"].ConnectionString;

        public DB_Oracle()
        {

        }

        /// <summary>

        /// 此方法是本类实例的唯一全局访问点

        /// （双重加锁 Double-Check Locking）

        /// </summary>

        /// <returns></returns>

        public DataBaseOpration.OprationOraDAL GetInstance()
        {

            //如实例不存在，则New一个新实例，否则返回已有实例
            if (db == null)
            {

                db = new DataBaseOpration.OprationOraDAL(_strOracleMIDConnString);

            }
            return db;


        }




    }
}